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Wednesday, Jul 23, 2014
A large landslide occurred from the southern wall of the Askja caldera yesterday night. The slide caused a large flood wave in the Öskjuvatn lake that also swept into the famous Viti crater. ... [more]
Location of the recent earthquakes near Askja (Iceland)
Saturday, May 03, 2014
A swarm of shallow earthquakes at 2-10 km depth has started under the Herðubreið volcano about 12 km NE of the Askja caldera. The largest earthquakes so far were 2 magnitude 3.2 and 3.0 events. ... [more]

Askja volcano

Stratovolcano 1516 m (4,974 ft)
Central Iceland, 65.03°N / -16.75°W
Current status: restless (2 out of 5)
Askja webcams / live data
Last update: 23 Jul 2014
Typical eruption style: explosive + effusive
Askja volcano eruptions: 1797(?), 1875, 1919, 1921, 1922, 1923, 1924(?), 1926, 1938, 1961
Last earthquakes nearby:
TimeMag. / DepthDistanceLocation
Thu, 31 Jul
Thu, 31 Jul 22:49 UTCM 0.4 / 5.6 km26 km3.6 km NNW of Herðubreið
Thu, 31 Jul 20:55 UTCM 0.4 / 5 km26 km4.0 km NNW of Herðubreið
Thu, 31 Jul 17:49 UTCM 0.8 / 4.9 km20 km4.5 km N of Herðubreiðartögl
Thu, 31 Jul 17:15 UTCM 0.3 / 3.4 km22 km3.0 km SSW of Herðubreið
Thu, 31 Jul 10:28 UTCM 0.2 / 2.9 km10 km3.6 km NE of Dreki
View all recent quakes
Askja is a large basaltic central volcano that forms the Dyngjufjöll massif. It is truncated by three overlapping calderas, the largest of which is 8 km wide and may have been produced primarily from subglacial ring-fracture eruptions rather than by subsidence.

Background:

A major rhyolitic explosive eruption from Dyngjufjöll about 10,000 years ago was in part associated with the formation of Askja caldera. Many postglacial eruptions also occurred along the ring-fracture. A major explosive eruption on the SE caldera margin in 1875 was one of Iceland's largest during historical time. It resulted in the formation of a smaller 4.5-km-wide caldera, now filled by Öskjuvatn lake, that truncates the rim of the larger central caldera. The 100-km-long Askja fissure swarm, which includes the Sveinagja graben, is also related to the Askja volcanic system, as are several small shield volcanoes such as Kollatadyngja. Twentieth-century eruptions at Askja have produced lava flows from vents located mostly near Öskjuvatn lake.

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Source: GVP, Smithsonian Institution



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